Green Tea Extract Associated With Improved Cognitive Function
The effect that green tea has on cognitive dysfunction has not yet been clinically verified. However, an initial small scale clinical study suggests that extracts from green tea may help cognitive function in mature adults, especially with short-term memory.
Participants in this pilot study included 12 Japanese nursing home residents with an average age of 88. All had been diagnosed with cognitive dysfunction. All of the participants took two grams of green tea powder every day for three months. Cognitive function of the participants was measured using the Mini-Mental State Examination Japanese version (MMSE-J) at the beginning and end of the study.
At the conclusion of the study, the participants showed improvements in the MMSE-J scores from an average of 15.3 at the onset to an average of 17.0 at the end. After examining the data, the researchers found that short-term memory was especially improved.
The researchers also noted improvements in triglyceride levels but no improvements in blood pressure, blood glucose, or cholesterol.
Researchers from the University of Shizuoka conducted the study. It was published on September 29, 2014, in the journal Nutrients.
Green tea has been linked in previous studies with numerous health benefits. These benefits are usually attributed to the high level of powerful antioxidants found in green tea called polyphenols, which have been shown to promote weight loss, improve heart health, aid in digestion and decrease the risk of neurodegenerative diseases.